Scratch-gage



(No Model.)

D. SUONRAD.

SGRATGH GAGE.

No. 325,505. PatentedSept. l, 1885.

- WVEJVTR .ditmaal/6* UNITED STATES PATENT @Erica DAVID STAR CONRAD, 0F VAYNESBOROUGH, PENNSYLVANIA SCRATCH-GAGE.

SPECIFICATION forming part of Letters Patent No, 325,505, dated September 1, 1885.

Application filed June 23, 1885.

To @ZZ whom, it may concern:

Be it known that I, DAVID S. CONRAD, a citizen of the United States, resident at Vaynesborough, in the county of Franklin and State of Pennsylvania, have :invented certain new and useful Improvements in Scribing-Gages; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertai ns to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l ofthe drawings is a representation of a plan view of this invention. Fig. 2 is a vertical section on line w, Fig. l. Fig. 3 is a transverse section on line y y, Fig. l; and Fig. 4 are detail Views of the same.

This invention relates to scribing-gages; and it consists in the construction and novel combination of parts, as will be hereinafter fully described, and particularly pointed out in the claims.

Referring by letter to the accompanying drawings, A designates the stock, bar, or rod of the device, which is preferably cylindrical in cross-section. Upon this rod or bar A is tted a slide, B, which forms the head of the gage, which head B is circular in form, and projects equally from all sides of the rod. A sliding thumb piece or clamp, C, has projecting from its face a slotted hollow screw, 11, which latter encircles the rod A. This hollow screw 6^ is cylindrical in cross-section, and tapers from the face of the thumb-screw C', and enters a threaded seat in the slide B. XVhcn the nut C is screwed up, the split or (No model.)

slotted hollow screw b will be compressed and caused to clamp the rod A, so that the head or slide B will be held at the point to which it may have been adjusted.

The rod or b ir Ais provided with a feather, A', extending quite or nearly its entire length, and the slot or slit in the hollow screw embraces this feather and guides the slide B on` the rod or bar A when the slide B is adjusted.

Near one end and opposite one face of the slide Bis the scribe or knife H, by which the mark or cut is to be made when operating the scribinggage.

By employing a gage of this construction the sliding head may be quickly and accurately adjusted to the point desired.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The scribing-gage consisting of the stock- Y DAVID STAR CONRAD.

'Witnessesz D. M. GOOD, .I r., JNO. R. DIFEENDTEFEER. 

